<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>框架</title>
</head>

<frameset rows="20%,*"  frameborder="1">
      <frame src="4,list.html"/>
    <frameset cols="30%,*">
        <frame src="4,list.html"/>
        <frame src="2.π.html">
    </frameset>
</frameset>

</html>